Which of following ions is discharged at cathode when conc NaCl solution is Electrolysed?

hydrogen ions H +(aq) (from the water) are discharged at the negative electrode as hydrogen gas, H 2(g) chloride ions Cl –(aq) (from the dissolved sodium chloride) are discharged at the positive electrode as chlorine gas, Cl 2(g)

When an aqueous solution of NaCl is Electrolysed which gas is obtained at cathode?

At the cathode (C), water is reduced to hydroxide and hydrogen gas. The net process is the electrolysis of an aqueous solution of NaCl into industrially useful products sodium hydroxide (NaOH) and chlorine gas.

What products are formed during the electrolysis of a concentrated aqueous solution of NaCl?

The product of electrolysis of concentrated aqueous sodium chloride are sodium hydroxide, hydrogen gas and chlorine gas.

Why is sodium not discharged at the cathode?

At the cathode Sodium ions and hydrogen ions (from the water) arrive, but sodium is so high in the electrochemical series that its ions aren’t discharged where there is any choice. If you electrolyse molten sodium chloride, then there is no choice – you have to discharge the sodium ions.

What happens at the cathode during the electrolysis of molten calcium chloride?

Predict which products form at the anode and the cathode during the electrolysis of molten calcium chloride. Calcium will form at the cathode and chlorine will form at the anode. This is because positive calcium ions are attracted to the negative electrode (cathode), where they gain electrons to form calcium atoms.

Which gas is liberated at anode during electrolysis of NaCl?

chlorine gas
At anode sodium metal and hydrogen gas are liberated. At cathode oxygen gas and chlorine gas are liberated.

When aqueous solution of NaCl is Electrolysed * A cl₂ is evolved at cathode B h₂ is evolved at cathode C NA is deposited at cathode D NA appears at anode?

Which is evolved at cathode when an aqueous solution of NaCl is electrolysed? Hydrogen gas is evolved at cathode.

What product are formed during electrolysis?

Products of electrolysis

• Pb 2+ ions gain electrons at the cathode and become Pb atoms.
• Br – ions lose electrons at the anode and become Br atoms, which pair up to form Br 2 molecules.

Which products are formed during the electrolysis of a concentrated aqueous solution of sodium E 9 chloride?

We produce sodium hydroxide and chlorine gas as a result of electrolysis off sodium chloride.

Which ions are discharged at the cathode first?

At cathode, H+ ions are preferentially discharged than Na+ ions as H+ ions are of much lower reactivity than Na+ ions.

Which ions are discharged at each electrode?

More videos on YouTube Metal ions receive electrons at the negative electrode, and the non-metals lose them at the positive electrode.

What happens when Na metal is liberated by electrolysis?

On electrolysis, Na metal should be liberated at the cathode and chlorine gas at the anode. First of all let us see what happens when both electrodes are made of inert materials like graphite or platinum. In such cases, electrolysis of brine gives hydrogen gas at the cathode and chlorine gas at the anode.

Why is NaOH discharged as H2 gas at the cathode?

In the manufacturing of NaOH H+ ions are discharged at cathode as H2 gas in preference to alkali metals like Na+. Since discharge potential of H+ ions is lower than that of alkali metal cations, thus instead of getting alkali metal ion on cathode, we get H2 gas. .

What is the product of electrolysis of concentrated aqueous sodium chloride?

The product of electrolysis of concentrated aqueous sodium chloride are sodium hydroxide, hydrogen gas and chlorine gas. Mercury used in the Caster-Kellner process contaminates the products and is an environmental hazard due to sublimation. Mercury being carcinogenic is eased out for the electrolysis of aqueous sodium chloride.

What are the factors that affect the preferential discharge of electrolysis?

However, if the concentration of a particular ion is high, then this can alter the preferential discharge. Also, if dilute hydrochloric acid is electrolyzed, hydrogen gas is produced at the cathode and oxygen gas at the anode.